itime.c revision 50476
1/*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 37#endif 38static const char rcsid[] = 39 "$FreeBSD: head/sbin/dump/itime.c 50476 1999-08-28 00:22:10Z peter $"; 40#endif /* not lint */ 41 42#include <sys/param.h> 43#include <sys/time.h> 44#ifdef sunos 45#include <sys/vnode.h> 46 47#include <ufs/fsdir.h> 48#include <ufs/inode.h> 49#include <ufs/fs.h> 50#else 51#include <ufs/ufs/dinode.h> 52#endif 53 54#include <protocols/dumprestore.h> 55 56#include <errno.h> 57#include <fcntl.h> 58#include <stdio.h> 59#ifdef __STDC__ 60#include <stdlib.h> 61#include <string.h> 62#endif 63 64#include "dump.h" 65 66struct dumpdates **ddatev = 0; 67int nddates = 0; 68int ddates_in = 0; 69struct dumptime *dthead = 0; 70 71static void dumprecout __P((FILE *, struct dumpdates *)); 72static int getrecord __P((FILE *, struct dumpdates *)); 73static int makedumpdate __P((struct dumpdates *, char *)); 74static void readdumptimes __P((FILE *)); 75 76void 77initdumptimes() 78{ 79 FILE *df; 80 81 if ((df = fopen(dumpdates, "r")) == NULL) { 82 if (errno != ENOENT) { 83 quit("cannot read %s: %s\n", dumpdates, 84 strerror(errno)); 85 /* NOTREACHED */ 86 } 87 /* 88 * Dumpdates does not exist, make an empty one. 89 */ 90 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 91 if ((df = fopen(dumpdates, "w")) == NULL) { 92 quit("cannot create %s: %s\n", dumpdates, 93 strerror(errno)); 94 /* NOTREACHED */ 95 } 96 (void) fclose(df); 97 if ((df = fopen(dumpdates, "r")) == NULL) { 98 quit("cannot read %s even after creating it: %s\n", 99 dumpdates, strerror(errno)); 100 /* NOTREACHED */ 101 } 102 } 103 (void) flock(fileno(df), LOCK_SH); 104 readdumptimes(df); 105 (void) fclose(df); 106} 107 108static void 109readdumptimes(df) 110 FILE *df; 111{ 112 register int i; 113 register struct dumptime *dtwalk; 114 115 for (;;) { 116 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 117 if (getrecord(df, &(dtwalk->dt_value)) < 0) 118 break; 119 nddates++; 120 dtwalk->dt_next = dthead; 121 dthead = dtwalk; 122 } 123 124 ddates_in = 1; 125 /* 126 * arrayify the list, leaving enough room for the additional 127 * record that we may have to add to the ddate structure 128 */ 129 ddatev = (struct dumpdates **) 130 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 131 dtwalk = dthead; 132 for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) 133 ddatev[i] = &dtwalk->dt_value; 134} 135 136void 137getdumptime() 138{ 139 register struct dumpdates *ddp; 140 register int i; 141 char *fname; 142 143 fname = disk; 144#ifdef FDEBUG 145 msg("Looking for name %s in dumpdates = %s for level = %c\n", 146 fname, dumpdates, level); 147#endif 148 spcl.c_ddate = 0; 149 lastlevel = '0'; 150 151 initdumptimes(); 152 /* 153 * Go find the entry with the same name for a lower increment 154 * and older date 155 */ 156 ITITERATE(i, ddp) { 157 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 158 continue; 159 if (ddp->dd_level >= level) 160 continue; 161 if (ddp->dd_ddate <= spcl.c_ddate) 162 continue; 163 spcl.c_ddate = ddp->dd_ddate; 164 lastlevel = ddp->dd_level; 165 } 166} 167 168void 169putdumptime() 170{ 171 FILE *df; 172 register struct dumpdates *dtwalk; 173 register int i; 174 int fd; 175 char *fname; 176 177 if(uflag == 0) 178 return; 179 if ((df = fopen(dumpdates, "r+")) == NULL) 180 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 181 fd = fileno(df); 182 (void) flock(fd, LOCK_EX); 183 fname = disk; 184 free((char *)ddatev); 185 ddatev = 0; 186 nddates = 0; 187 dthead = 0; 188 ddates_in = 0; 189 readdumptimes(df); 190 if (fseek(df, 0L, 0) < 0) 191 quit("fseek: %s\n", strerror(errno)); 192 spcl.c_ddate = 0; 193 ITITERATE(i, dtwalk) { 194 if (strncmp(fname, dtwalk->dd_name, 195 sizeof (dtwalk->dd_name)) != 0) 196 continue; 197 if (dtwalk->dd_level != level) 198 continue; 199 goto found; 200 } 201 /* 202 * construct the new upper bound; 203 * Enough room has been allocated. 204 */ 205 dtwalk = ddatev[nddates] = 206 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 207 nddates += 1; 208 found: 209 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 210 dtwalk->dd_level = level; 211 dtwalk->dd_ddate = spcl.c_date; 212 213 ITITERATE(i, dtwalk) { 214 dumprecout(df, dtwalk); 215 } 216 if (fflush(df)) 217 quit("%s: %s\n", dumpdates, strerror(errno)); 218 if (ftruncate(fd, ftell(df))) 219 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 220 (void) fclose(df); 221 msg("level %c dump on %s", level, 222 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 223} 224 225static void 226dumprecout(file, what) 227 FILE *file; 228 struct dumpdates *what; 229{ 230 231 if (fprintf(file, DUMPOUTFMT, 232 what->dd_name, 233 what->dd_level, 234 ctime(&what->dd_ddate)) < 0) 235 quit("%s: %s\n", dumpdates, strerror(errno)); 236} 237 238int recno; 239 240static int 241getrecord(df, ddatep) 242 FILE *df; 243 struct dumpdates *ddatep; 244{ 245 char tbuf[BUFSIZ]; 246 247 recno = 0; 248 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 249 return(-1); 250 recno++; 251 if (makedumpdate(ddatep, tbuf) < 0) 252 msg("Unknown intermediate format in %s, line %d\n", 253 dumpdates, recno); 254 255#ifdef FDEBUG 256 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 257 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 258#endif 259 return(0); 260} 261 262static int 263makedumpdate(ddp, tbuf) 264 struct dumpdates *ddp; 265 char *tbuf; 266{ 267 char un_buf[128]; 268 269 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 270 ddp->dd_ddate = unctime(un_buf); 271 if (ddp->dd_ddate < 0) 272 return(-1); 273 return(0); 274} 275